Companies using public IP space owned by others for internal routing

Ca By cb.list6 at
Sun Dec 17 23:15:46 CST 2017

On Sun, Dec 17, 2017 at 5:31 PM Robert Webb <rwebb at> wrote:

> Will anyone comment on the practice of large enterprises using non RFC1918
> IP space that other entities are assigned by ARIN for internal routing?
> Just curious as to how wide spread this might be. I just heard of this
> happening with a large ISP and never really thought about it until now.
> Robert

To answer your question, it is not uncommon. It is bad, but you do what you
have to do when rfc1918 is tied up


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